CaltechAUTHORS
  A Caltech Library Service

Hubble Space Telescope Observations of the HD 202628 Debris Disk

Krist, John E. and Stapelfeldt, Karl R. and Bryden, Geoffrey and Plavchan, Peter (2012) Hubble Space Telescope Observations of the HD 202628 Debris Disk. Astronomical Journal, 144 (2). Art. No. 45. ISSN 0004-6256. https://resolver.caltech.edu/CaltechAUTHORS:20120827-103433134

[img]
Preview
PDF - Published Version
See Usage Policy.

1797Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20120827-103433134

Abstract

A ring-shaped debris disk around the G2V star HD 202628 (d = 24.4 pc) was imaged in scattered light at visible wavelengths using the coronagraphic mode of the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. The ring is inclined by ~64° from face-on, based on the apparent major/minor axis ratio, with the major axis aligned along P.A. = 130°. It has inner and outer radii (>50% maximum surface brightness) of 139 AU and 193 AU in the northwest ansae and 161 AU and 223 AU in the southeast (Δr/r ≈ 0.4). The maximum visible radial extent is ~254 AU. With mean surface brightness of V ≈ 24 mag arcsec^(–2), this is the faintest debris disk observed to date in reflected light. The center of the ring appears offset from the star by ~28 AU (deprojected). An ellipse fit to the inner edge has an eccentricity of 0.18 and α = 158 AU. This offset, along with the relatively sharp inner edge of the ring, suggests the influence of a planetary-mass companion. There is a strong similarity with the debris ring around Fomalhaut, though HD 202628 is a more mature star with an estimated age of about 2 Gyr. We also provide surface brightness limits for nine other stars in our study with strong Spitzer excesses around which no debris disks were detected in scattered light (HD 377, HD 7590, HD 38858, HD 45184, HD 73350, HD 135599, HD 145229, HD 187897, and HD 201219).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-6256/144/2/45DOIArticle
http://iopscience.iop.org/1538-3881/144/2/45/PublisherArticle
ORCID:
AuthorORCID
Stapelfeldt, Karl R.0000-0002-2805-7338
Plavchan, Peter0000-0002-8864-1667
Additional Information:© 2012 American Astronomical Society. Received 2012 March 6; accepted 2012 May 10; published 2012 July 6. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. The Spitzer Space Telescope is operated by the Jet Propulsion Laboratory, California Institute of Technology, under NASA contract 1407. This work was funded byNASA via a Hubble Space Telescope General Observer Grant (program 12291) to the Jet Propulsion Laboratory, California Institute of Technology, and the Spitzer Project Science Office at JPL.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASANAS 5-26555
NASA1407
NASA12291
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:circumstellar matter; stars: individual (HD 202628, HD 377, HD 7590, HD 38858, HD 45184, HD 73350, HD 135599, HD 145229, HD 187897, HD 201219)
Issue or Number:2
Record Number:CaltechAUTHORS:20120827-103433134
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120827-103433134
Official Citation:Hubble Space Telescope Observations of the HD 202628 Debris Disk John E. Krist et al. 2012 The Astronomical Journal 144 45
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33556
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Aug 2012 18:04
Last Modified:30 Oct 2019 19:51

Repository Staff Only: item control page